identication

There is three of these in my tank as of now, should I be concerned with them?

Started as 1 head when I first bought the tank 2 years ago and havent found out what the specific name is still lol. I took the picture during a water change, so it's pretty retracted usually 6x the length.

I have been battling ugly phase in my tank for months now. I also have struggling corals. My parameters: NO3 8 PO4 0.13 Alk 8.7 Mg 1380 Ca 390 I have LPS mostly and I had ton of corals die off and I am trying to see if I have some sort of toxic organism in my tank. I took some microscopic...

Long established tank, this one rock has development this green algae and the other some kind of black (algae? Sponge?) what are they and how can I get rid of them? Root cause?

i was wondering if someone can help not only id this lps frag my buddy gave me and what's going on with it. i noticed it has these hard crystal like balls which seem to be attached to the top base of the skeleton.

About a month or so ago I had a small patch of this red colored algae pop up in my tank. Every time I try and vacuum it out it spreads slightly more and comes right back the next day. Color intensifies as the lights turn on and starts to disappear as lights turn off. It's a rusty red color - not...

Anyone recognize this? Our salt water tank is about 18 months old. We have two clownfish, clear shrimp, goby and pistol shrimp as well as clean up crew (hermit crabs, snails, etc.) It almost looks like some kind of eggs but my wife and I have no idea. Any help identifying what this is so we...

Hello all. Iv noticed my torch coral has been stressed recently for no apparent reason yet evething else is doing well. Yesterday i noticed this cluster of something and a small hole in the flesh of my torch. I came down this morning and the cluster of highlighted spots are gone. Are they pests...

Anyone know what type of anemones these are?

Hello! I’m fairly new to the saltwater aquarium hobby (been doing freshwater for a long time) and need help with the ID of the morph of the clown fish I have. I got it from a buddy who breeds them. Also would love estimates on pricing to see if I got a good deal! Thanks all! Pics attached

Hello, I am conducting research on megalopae (larval) stages and I have come across a few that I do not have a species for. Two of these may be the same species, as they looked similar but one is darker. The third is white with that distinct strip so I am thinking maybe a rock crab? I have a...

Can anyone help me ID this wrasse? Got it from local reefer but not sure what it is. The body is mostly black with one eye on top fin. Tail is white/transparent

Hey reefers, I need help with an algae/bacteria ID. I’m at my wit’s end- nothing seems to match 100%. TL;DR: 664 gallon inter-plumbed trough system in retail setting. Bubbly/turfy green/brown eyesore appeared about the same time as nutrients bottoming out a few months ago. Stabilizing chems...

Hello everyone, I've been noticing reduced polyp extension and declining health on some of my acropora recently, upon further inspection I noticed small white spots scattered on the corals tissue. I suspected some type of parasitic copepod but these guys are much smaller than the red bugs that...

Hi all, I'm assuming this is a zoa/button polyp that hitchhiked on some live rock/my decorator crab, does this look like a paly to you? It seems like one to me, I know they are more toxic and I am wondering if I should grab some PPE to remove it now if I don't want to constantly deal with the...

Hey I just bought this blondie zoa frag and I'm noticing what appears to be a green sps encrusting it. I was hoping i could get help with identification. Also, how do I save the encruster and the zoa?

I got this frag from an online seller and they didn’t say what the name of it was. Does anyone know what it is called I’ve tried finding it myself with no luck it just says it’s a Monti it’s the red one in the middle. Any help would be appreciated 😃 it also has little tentacles that come out in...

Are these brown clove polyps growing beside my Zoas? If so should I try and get rid of them? THanks!

Hi everybody, I set up and started (4 days ago) My first reef, today i noticed this 3 things, what are they? Are they “reef safe”? (Last pic i reefer to the “eyebrows” coming out of the rock). Thanks everyone, and nice to meet you all!

Howdy folks! First post here. Found in the dip of a shipment of corals from Indonesia, not positive what colony it came out of. Any ideas what it could be? Body shape resembles a bumblebee shrimp.

Hello everyone, I need help identifying the species of this Chalice that was sold to me only as a "Red Chalice." With its correct name, I'll be able to research more about its specific needs. Its color doesn't do justice to the photo, but under my lighting, it has a really beautiful shade of pink.

Around 3 days ago I noticed a growth forming on mu anemone near it's mouth it looks sponge like should I be worried?

I purchased a few more snails for clean up crew on my 25 gallon tank that is roughly a year and a half old. I don’t recognize the growth on its shell, can anyone identify it? Should I be concerned? It almost looks like small spikes sticking out of the top surface of its shell.

I purchased an Anthias from my LFS for $15 as the owner wasn’t sure of which species it was. I have spent quite a bit of time attempting to match it up for a positive ID yet I’m hoping that somebody on here would be so kind to help me out? :) The dorsal fin is a brilliant magenta which...